Header File 

conio.h  

Category 

Console I/O Routines 

Prototype 

void window(int left, int top, int right, int bottom); 

Description 

Defines active text mode window.

left and top are the screen coordinates of the upper left corner of the window. 

right and bottom are the screen coordinates of the lower right corner. 

The minimum size of the text window is one column by one line. The default window is full screen, with the coordinates: 

1,1,C,R 

where C is the number of columns in the current video mode, and R is the number of rows. 

Return Value 

None. 

Example  

#include <conio.h>
int main(void)
{
   window(10,10,40,11);
   textcolor(BLACK);
   textbackground(WHITE);
   cprintf("This is a test\r\n");
   return 0;
}

Portability